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232 lines
6.5 KiB
Perl
232 lines
6.5 KiB
Perl
package Math::Farnsworth::Value::String;
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use strict;
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use warnings;
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use Math::Farnsworth::Dimension;
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use Math::Farnsworth::Value;
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use Carp;
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use utf8;
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our $VERSION = 0.6;
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use overload
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'+' => \&add,
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'-' => \&subtract,
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'*' => \&mult,
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'/' => \&div,
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'%' => \&mod,
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'**' => \&pow,
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'<=>' => \&compare,
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'bool' => \&bool;
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use base qw(Math::Farnsworth::Value);
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#this is the REQUIRED fields for Math::Farnsworth::Value subclasses
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#
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#dimen => a Math::Farnsworth::Dimension object
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#
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#this is so i can make a -> conforms in Math::Farnsworth::Value, to replace the existing code, i'm also planning on adding some definitions such as, TYPE_PARI, TYPE_STRING, TYPE_LAMBDA, TYPE_DATE, etc. to make certain things easier
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sub new
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{
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my $class = shift;
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my $value = shift;
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my $lang = shift;
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my $outmagic = shift; #i'm still not sure on this one
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confess "Non string given as \$value to constructor" unless ref($value) eq "" && defined($value);
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my $self = {};
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bless $self, $class;
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$self->{outmagic} = $outmagic;
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{
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no warnings 'uninitialized';
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$self->{string} = "".$value;
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}
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$self->{lang} = $lang || "";
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return $self;
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}
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sub getstring
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{
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return $_[0]->{string};
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}
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sub getlang
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{
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return $_[0]->{lang};
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}
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#######
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#The rest of this code can be GREATLY cleaned up by assuming that $one is of type, Math::Farnsworth::Value::Pari, this means that i can slowly redo a lot of this code
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sub add
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{
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my ($one, $two, $rev) = @_;
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confess "Non reference given to addition" unless (ref($two));
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#if we're not being added to a Math::Farnsworth::Value::Pari, the higher class object needs to handle it.
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confess "Scalar value given to addition to string" if ($two->isa("Math::Farnsworth::Value::Pari"));
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return $two->add($one, !$rev) unless ($two->ismediumtype());
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if (!$two->istype("String"))
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{
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confess "Given non boolean to boolean operation";
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}
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#NOTE TO SELF this needs to be more helpful, i'll probably do this by creating an "error" class that'll be captured in ->evalbranch's recursion and use that to add information from the parse tree about WHERE the error occured
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my $new;
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$new = $one->getstring() . $two->getstring() unless $rev;
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$new = $two->getstring() . $one->getstring() if $rev;
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my $lang = "";
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$lang = $one->getlang() if ($one->getlang() eq $two->getlang()); #if we know their language, and they're the same, just keep it
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return new Math::Farnsworth::Value::String($new); #return new string
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}
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sub subtract
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{
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my ($one, $two, $rev) = @_;
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confess "Non reference given to subtraction" unless (ref($two));
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#if there's a higher type, use it, subtraction otherwise doesn't make sense on arrays
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die "Scalar value given to subtraction to strings" if ($two->isa("Math::Farnsworth::Value::Pari"));
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return $two->subtract($one, !$rev) unless ($two->ismediumtype());
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if (!$two->istype("String"))
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{
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confess "Given non boolean to boolean operation";
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}
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die "Subtracting strings? what did you think this would do, create a black hole?";
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}
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sub modulus
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{
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my ($one, $two, $rev) = @_;
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confess "Non reference given to modulus" unless (ref($two));
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#if there's a higher type, use it, subtraction otherwise doesn't make sense on arrays
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confess "Scalar value given to modulus to string" if ($two->isa("Math::Farnsworth::Value::Pari"));
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return $two->mod($one, !$rev) unless ($two->ismediumtype());
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if (!$two->istype("String"))
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{
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confess "Given non string to string operation";
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}
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die "Modulusing strings? what did you think this would do, create a black hole?";
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}
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sub mult
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{
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my ($one, $two, $rev) = @_;
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confess "Non reference given to multiplication" unless (ref($two));
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#if there's a higher type, use it, subtraction otherwise doesn't make sense on arrays
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confess "Scalar value given to multiplcation to string" if ($two->isa("Math::Farnsworth::Value::Pari"));
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return $two->mult($one, !$rev) unless ($two->ismediumtype());
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if (!$two->istype("String"))
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{
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confess "Given non string to string operation";
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}
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die "Multiplying strings? what did you think this would do, create a black hole?";
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}
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sub div
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{
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my ($one, $two, $rev) = @_;
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confess "Non reference given to division" unless (ref($two));
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#if there's a higher type, use it, subtraction otherwise doesn't make sense on arrays
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confess "Scalar value given to division to string" if ($two->isa("Math::Farnsworth::Value::Pari"));
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return $two->div($one, !$rev) unless ($two->ismediumtype());
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if (!$two->istype("String"))
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{
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confess "Given non string to string operation";
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}
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die "Dividing string? what did you think this would do, create a black hole?";
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}
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sub bool
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{
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my $self = shift;
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#seems good enough of an idea to me
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#i have a bug HERE
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#print "BOOLCONV\n";
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#print Dumper($self);
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#print "ENDBOOLCONV\n";
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return length($self->getstring())?1:0;
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}
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sub pow
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{
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my ($one, $two, $rev) = @_;
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confess "Non reference given to exponentiation" unless (ref($two));
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#if there's a higher type, use it, subtraction otherwise doesn't make sense on arrays
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confess "Exponentiating strings? what did you think this would do, create a black hole?" if ($two->isa("Math::Farnsworth::Value::Pari"));
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return $two->pow($one, !$rev) unless ($two->ismediumtype());
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if (!$two->istype("String"))
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{
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confess "Given non string to string operation";
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}
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die "Exponentiating strings? what did you think this would do, create a black hole?";
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}
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sub __compare
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{
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my ($a1, $a2) = @_;
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my $same = 0;
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my $ea = each_array(@$a1, @$a2);
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while(my ($first, $second) = $ea->())
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{
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$same = $first > $second ? 1 : -1 and last if $first != $second
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} # shortcircuits
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return $same;
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}
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sub compare
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{
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my ($one, $two, $rev) = @_;
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confess "Non reference given to compare" unless (ref($two));
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#if we're not being added to a Math::Farnsworth::Value::Pari, the higher class object needs to handle it.
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confess "Scalar value given to division to string" if ($two->isa("Math::Farnsworth::Value::Pari"));
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return $two->compare($one, !$rev) unless ($two->ismediumtype());
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my $rv = $rev ? -1 : 1;
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#check for $two being a simple value
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my $tv = $two->getstring();
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my $ov = $one->getstring();
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#i also need to check the units, but that will come later
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#NOTE TO SELF this needs to be more helpful, i'll probably do something by adding stuff in ->new to be able to fetch more about the processing
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die "Unable to process different units in compare\n" unless $one->conforms($two); #always call this on one, since $two COULD be some other object
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#moving this down so that i don't do any math i don't have to
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my $new = $tv cmp $ov;
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return $new * $rv;
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}
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